Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9b14989cd953f2…

MALICIOUS

PDF

42.8 KB
MD5: 72fedc1af33600fa48693b3c5f5befb3 SHA-1: 28cdae113199fb31f65d54c86df94e2ade5ff19d SHA-256: 7e9b14989cd953f251373b0cf35f7f00365776cd36d9f8c1efbc3a84379e2246
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Exploit.Agent-36830. The presence of XFA forms and embedded script payloads indicates an attempt to exploit PDF vulnerabilities for client execution. The embedded script, though partially obfuscated, appears to be JavaScript, likely intended to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
a78a60435d05788dc9c8afafc9a3bff1819cfab7746390b794169c16bcd502b8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43092 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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